/**
 * Copyright (c) 2011 Roundarch (www.roundarch.com)
 *
 * Author Joshua Jung
 *
 * ---
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.roundarch.flex.controls.graphControlConstraints
{
    import com.roundarch.flex.controls.graphControlInterfaces.IGraphControlSelector;
    import flash.events.Event;
    import flash.events.EventDispatcher;
    import flash.geom.Point;

    /**
     *
     * @author jjung
     */
    public class ConstraintHard extends EventDispatcher implements ISelectorConstraint
    {
        //---------------------------------------------------------------------
        //
        //  Properties
        //
        //---------------------------------------------------------------------
        //-----------------------------
        // constraintFunction
        //-----------------------------
        /**
         * @private
         */
        protected var _constraintFunction : IPointConstraintFunction = null;

        [Bindable("constraintFunctionChanged")]
        /**
         *
         *
         * @default null
         */
        public function get constraintFunction() : IPointConstraintFunction
        {
            return _constraintFunction;
        }

        /**
         * @private
         */
        public function set constraintFunction(value : IPointConstraintFunction) : void
        {
            if (value == _constraintFunction)
            {
                return;
            }

            _constraintFunction = value;

            dispatchEvent(new Event("change"));
            dispatchEvent(new Event("constraintFunctionChanged"));
        }

        //-----------------------------
        // value
        //-----------------------------
        /**
         * @private
         */
        protected var _value : Point = null;

        [Bindable("valueChanged")]
        /**
         *
         *
         * @default null
         */
        public function get value() : Point
        {
            return _value;
        }

        /**
         * @private
         */
        public function set value(value : Point) : void
        {
            if (value == _value)
            {
                return;
            }

            _value = value;

            dispatchEvent(new Event("change"));
            dispatchEvent(new Event("valueChanged"));
        }

        //---------------------------------------------------------------------
        //
        //  Constructor
        //
        //---------------------------------------------------------------------
        /**
         *  Constructor
         */
        public function ConstraintHard()
        {
        }

        //---------------------------------------------------------------------
        //
        //  Methods
        //
        //---------------------------------------------------------------------
        /**
         * This just proxies the point constriant to the one provided via AS or MXML.
         */
        public function constrain(requestedPoint : Point, selector : IGraphControlSelector) : Point
        {
            if (value)
            {
                return constraintFunction.constrain(requestedPoint, value);
            }

            return requestedPoint;
        }
    }
}
